ScanBeforeOpen
Guides for safer files
Practical defensive guidance for attachments, downloads, Office files, archives, images, and AI workflows.
Check a PDF before opening it
How to defensively review PDFs for active content, attachments, links, and AI risks.
Detect Word, Excel, and PowerPoint macros
Defensive guidance for macros, external relationships, and hidden Office content.
Check ZIP files safely
Recognize risky names, path traversal, dangerous extensions, and ZIP bomb signals.
Avoid CSV formula injection
Why cells starting with =, +, -, or @ can be risky and how to neutralize them.
Remove image metadata
Spot EXIF, GPS, camera, and software metadata in images.
Scan files before AI upload
Surface hidden instructions, metadata, and confidential content before giving files to AI systems.
Understand invisible Unicode characters
Defensively detect zero-width characters, bidi controls, and mixed scripts.
Reduce document fingerprints: rebuild instead of only scanning
Why layout, object, and watermark risks are often better reduced through local reconstruction.
Check email attachments safely
A defensive workflow for attachments from inboxes.
Check messenger files safely
Why files from chats should also be reviewed before opening.
Is downloading dangerous?
What makes downloads risky and why opening, executing, and extracting are different steps.